Mold-cooling means



S. M. UDALE Nov. 30 1926.

INVENTOR.

v2 ,d fu, f2

Patented Nov. 30, 1926.

UNITED sTATEs PATENT- OFFICE.

STANLEY M. lUDALE, OFv'DETROIT, MICHIGAN, ASSIGNOR TO EARL HOLLEY, 0F

i DETROIT, MICHIGAN.

MOLD-COOLING MEANS.

Application filed December 19, 1923. Serial No. 681,456.

This invention relates to'a metal mold adapted for the production of unsymmetrical castings. It is specifically adapted to the production of cast iron carbureters of the horizontal type. The object of thls invention is to compensate for the 'unequal heating of various parts of the mold due to the lack of symmetry of the castings castv therein.

Figure l shows in elevation one of the molds. Figure 2 shows ing mold.

Figure 3 shows in cross sectional elevation, 0n the plane 3 3 of Figures 1 and-2, these two corresponding molds in` position enclosin acore. f' l igure-4 shows a cross sectional elevation of the castings adapted to be cast in these molds.

In Figures 1, 2, and 3, A is the left hand mold of Figure 3, shown in elevation in Figure 1. ure 3, shown in elevation in Figure 2. C is thecore supported-and locked in place b y means of the projection D. Each mold 1s provided with corresponding sprues E and E', shown in Figures 1'" and 2, and arranged to discharge iron against the core C, as de- 39 scribed in the co-pending applicatlon of De Forest W. Candler, Serial No. 544,114, allowed July 27, 1923, filed March 16, 1922.

In Figure 3, J is the coating of someheat insulating material, preferably fire clay with a heat resisting binder such as soluble silicate, commonly known as Water glass. This coating of fire clay may be applied as 1n the manner described in the patent to Meloche, #1.453,593.

40 -The purpose of this coating of fire clay will be described below:

Figure 4 shows the casting cast in the` in elevation a correspondthe chilling of the iron of the flange h, and

B is the right hand mold of Fig# heated due to the relatively massive section adjacent to the part g of the casting, see Figure 4. On the other hand, that portion of the mold adjacent to the depression H,

tends not to overheat and to remain relatively cold because in it is cast only the thin flange it (Figure 4).

It is therefore very desirable to preventl equally important to prevent the overheai ing of the metal mold adjacent to the depression G.

The cooling of the mold is very conveniently arranged by directing a blast of air at the back ofthe mold which is left open for this purpose. Obviously some means muet be provided for preventing the overcoolingof the portion of the mold adjacent to the depression II.

The heat insulating coating J prevents the flow of heat from that portion of the mold surrounding the depression H and thus a balance is struck between the tendency of the lnold to overheat at G and the tendency of the mold to chill the casting in the depression H. 1

What I claim is:

A mold `adapted for castings having large and smallvsections, comprising a mold having substantially uniform Wall thickness, a layer ot heat insulating material applied on the outside of that portion of the mold in heat conducting relationship to the relatively less massive section of the casting, Whereby the heat dissipating surface is decreased at selected portions for thev purpose described.

In testimony whereof I aix mysignature.

STANLEY M. runnin.y 

